dear sir
you are doing a great job for biginners.
i have a request
do u have any excel file from which we can get the quantity of materials
(required cement= ? , sand= ? ,fine aggr=? course aggre = ...

Hope you know about different mixes of concrete has different proportions like M20 has 1:1.5:3, These ratios are as per IS Codes and same is followed in concrete mixes.
Where as in Design mix,
The Proportions are decided by the client itself,
it ...